Results 191 - 200 of 646

• Comparison of Passive Seat Suspension with Different Configuration of Seat Pads and Active Seat Suspension
  4/1/2008 - Conference papers
  Through modeling, this paper analyzes the performance of vehicle operators when subjected to vibration from rough road conditions, and quanttifies the energy transmission in the presence of specialized seat padding and active suspension.
• Rock Mass Behavior and Support Response in a Longwall Panel Pre-Driven Recovery Room
  3/1/2008 - Conference papers
  Some surprising results were revealed in this study designed and implemented by NIOSH to evaluate the effectiveness of pre-driven longwall recovery rooms supported with pumpable concrete roof supports.
• Field Observations and Numerical Studies of Horizontal Stress Effects on Roof Stability in U.S. Limestone Mines
  3/1/2008 - Conference papers
  This paper describes a modeling approach that can be used as a tool to evaluate potential roof failure and optimize the stability of room and pillar layouts.
• Reservoir Modeling-Based Prediction and Optimization of Ventilation Requirements During Development Mining in Underground Coal Mines
  2/1/2008 - Conference papers
  This NIOSH study presents an approach for prediction of methane inflow rates using coalbed methane reservoir modeling which can be used to limit the methane concentrations occurring as a result of the influences of various coalbed and operational parame...
• Using Mine Planning and Other Techniques to Improve Ventilation in Large-Opening Mines
  2/1/2008 - Conference papers
  This paper describes NIOSH research demonstrating that the ventilation of large-opening mines improves significantly by including ventilation requirements in the mine planning process and implementing some practical techniques during mining.
• Analysis of Seismic Signatures from Gas and Dust Based Explosions at the Lake Lynn Experimental Mine
  2/1/2008 - Conference papers
  A seismic monitoring system at NIOSH's Lake Lynn Experimental Mine has monitored gas and dust-based explosions and impact tests. Results suggest that large unrestricted explosions can generate the same magnitude as small restricted explosions.
• A Case Study Examination of Two Blast Rounds at a Nevada Gold Mine
  1/1/2008 - Conference papers
  NIOSH researchers collected basic data from two blast rounds at the SSX-Steer Mine as a component of a larger study on controlled blasting, the goal of which is to reduce injuries from falling rocks in underground mines.
• Application of the NIOSH-Modified Holmberg-Persson Approach to Perimeter Blast Design
  1/1/2008 - Conference papers
  This paper presents a modification which corrects the mathematical error in the Holmberg-Persson approach to perimeter blast design.
• Development and Evaluation of a Urethane Jacketed Tail Roller for Continuous Mining Machines
  11/1/2007 - Conference papers
  This paper details laboratory noise testing results of a continuous mining machine conveyor system which uses a coating for the tail roller designed to help bring the continuous mining machine into compliance with federal noise regulations.
• Remote Mine Fire Suppression Technology
  11/1/2007 - Conference papers
  This paper presents a summary of remote mine firefighting technologies used in U.S. underground coal mines and the results of completed NIOSH research in that area.